<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<script type="text/javascript">
			var m = "3";//string
			var n = 3;// number
			if (m == n) {
				console.log("m==n");//值相等
			}
			if (m === n) {
				console.log("m===n");//值一样，类型也一样
			}
		</script>
	</head>
	<body>
	</body>
</html>
